Rockers The All-American Rejects (AAR) want to help spread the word about how great adoptable pets are. And they should know: Guitarist Nick Wheeler’s adopted dog, Dexter, is their unofficial fifth member and joins them on all their U.S. tours! (Read Nick’s Happy Tail.)

So all year, AAR will be working with Petfinder to help other pets find homes and to give back to those who help. First up: Three lucky Petfinder fans will win tickets to see AAR in concert and a signed copy of their new album, Kids in the Street. (Find out how to enter here.)

Check back often to learn more about how AAR and Petfinder are working together to help homeless pets. Plus: Don’t miss more adorable photos of Dex after the jump.

Dex chills out at the 2010 Vans Warped Tour, where the band performed.

Dex’s first flight with Nick

(All photos courtesy of The All-American Rejects)

Are you a fan of The All-American Rejects and pet adoption? Like Petfinder on Facebook and enter for a chance to win tickets to see The All-American Rejects in concert, plus a signed copy of AAR’s new album, Kids in the Street!